Well, there they go again. Two Republican presidential candidates, Gov. Scott Walker and Sen. Marco Rubio, have outlined their plans to repeal and replace Obamacare, repeating tired myths like the law has increased costs for consumers. While both candidates omit critical details, it's clear that either proposal would be a disaster for consumers.

Both would repeal a law that has enrolled over 2 million New Yorkers and lowered costs by an average of 50 percent in the individual market, and set standards for health plan quality, reducing the chances that consumers will be stuck with massive bills.

Instead, they would, according to the Roosevelt Institute's Richard Kirsch, "return to the days when insurance companies could deny coverage or charge higher premiums because of a pre-existing condition, charge women more for health insurance than men and stop paying claims when people have high cost illnesses."

Yes, Obamacare should be improved through steps like increasing the federal subsidies now provided to make health coverage more affordable. But the solution is not to take apart a law that is working and loosen critical consumer protections that prevent health insurers from selling substandard plans.